5G NR Resource Indication via Aggregation Level and Offset
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Solution Overview
Problem
In the 5G New Radio (NR) system, the dynamic change in time domain symbol occupation by the downlink control channel makes it difficult for terminals to determine the correct time domain resource location for data reception, unlike in LTE systems where the PDSCH ending is the last symbol by default.
Innovation Solution
A resource indication method where a terminal receives first indication information from a base station, which includes a time scheduling unit aggregation level and a specific time domain location, allowing the terminal to determine the valid time domain resource location for downlink data transmission, reducing signaling overheads by indicating a large time domain range using a small quantity of bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the downlink control channel dynamically changes time domain symbol occupation in 5G NR system, then the system flexibility and adaptability are improved, but the terminal's ability to determine correct time domain resource location deteriorates
Solution Approach 1:
The patent segments the time domain resource indication into multiple parts: a first indication information indicating a first time domain resource location, and a second indication information indicating an offset value. This segmentation allows the system to maintain flexibility while providing the terminal with a clear method to determine the correct resource location by combining the two pieces of information.
Solution Approach 2:
The patent introduces an intermediary offset value that mediates between the dynamically changing control channel configuration and the terminal's resource determination. The offset value serves as a bridge, allowing the terminal to calculate the correct time domain resource location even when the control channel configuration changes dynamically.
2Measurement precision
If the terminal separately indicates time domain locations in all time scheduling units, then the data reception accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges the indication of time domain resource locations across multiple time scheduling units into a unified indication method. Instead of separately indicating locations in each scheduling unit, the system uses a first indication information that applies to multiple scheduling units, combined with a second indication information that provides necessary adjustments, thereby reducing signaling overhead while maintaining accuracy.
Solution Approach 2:
The patent applies partial indication by providing a general first time domain resource location that covers multiple scheduling units, and then applying partial corrections through the offset value only where needed. This approach avoids the excessive action of fully separately indicating every time domain location, thus reducing signaling overhead while maintaining necessary precision.
Data Source
AI summary
A resource indication method and an apparatus are provided, to increase a data reception success rate of a terminal. The method includes: receiving, by a terminal, first indication information from a base station, where the first indication information is used to indicate a resource configuration for a downlink data transmission, the resource configuration includes a time scheduling unit aggregation level and a time domain location in a single time scheduling unit, and the aggregation level represents a quantity of time scheduling units included in a resource for the downlink data transmission; and determining, by the terminal, that a time domain resource in the single time scheduling unit is valid for each time scheduling unit of one or more time scheduling unit a quantity of which is represented by the aggregation level, and receiving the downlink data transmission accordingly.